**NOTFORLANDING** New link rel=prerender API

chrome/renderer/prerender/prerenderer_client.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/renderer/prerender/prerenderer_client.h"
+
+#include "chrome/renderer/prerender/prerender_extra_data.h"
+#include "content/public/renderer/render_view.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebView.h"
+
+namespace {
+
+int getNextPrerenderId() {
+  static int nextPrerenderId = 1;
+  return nextPrerenderId++;
+}
+
+}
+
+namespace prerender {
+
+PrerendererClient::PrerendererClient(content::RenderView* render_view)
+    : content::RenderViewObserver(render_view) {
+  DVLOG(5) << "PrerendererClient::PrerendererClient()";
+  if (render_view)  // NULL in unit tests.
+    render_view->GetWebView()->setPrerendererClient(this);
+}
+
+void PrerendererClient::willAddPrerender(
+    WebKit::WebPrerender* prerender) {
+  DVLOG(3) << "PrerendererClient::willAddPrerender url = "
+           << prerender->url().spec().data();
+  prerender->setExtraData(new PrerenderExtraData(getNextPrerenderId(),
+                                                 routing_id(),
+                                                 render_view()->GetSize()));
+}
+
+}